Find the length of KM. Help

X-intercept=-5 y-intercept=2 the equation of the line is

Aword processing program requires a 7- digit registration code made up of the digits 1,2,4,5,6,7 and 9 each number has to be used and no number can be used mor than once how many codes are possible

Gabrielle's age is two times mikhail's age. the sum of their ages is 84. what is mikhail's age?